Studies in family planning
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This report provides an update of the authors' previous estimates of first-year probabilities of contraceptive failure for all methods of contraception. Estimates are provided of failure during typical use (which includes both incorrect and inconsistent use) and during perfect use (correct use at every act of intercourse). ⋯ These revisions are prompted by recent studies that provide the first estimates of failure during perfect use for periodic abstinence and the cervical cap, by more complete evaluations of implants, and by the appearance of the Copper T 380A and disappearance of other IUDs from the US market. Also provided is a more complete explanation of how the previous estimate of the probability of becoming pregnant while relying solely on chance should be interpreted, and this estimate is revised slightly downward.
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The findings of this study suggest that, compared to the United States, Danish health care policies and family planning services delivery systems are, in the aggregate, more conducive to the promotion of effective contraceptive practice, more instrumental in conveying information to high-risk groups, and more successful in reducing the incidence of unintended pregnancies and induced abortions. One of the major reasons for this difference may stem from the positive and nonambivalent climate of public opinion about sexuality in Denmark and the manner in which health care and family planning services are delivered to all segments of the population regardless of age, income, or location of residence. Research in reproductive behavior is greatly facilitated by the existence of automated population registers.